Pilot-light burner for water-heaters.



g E. RUUD. A PILOT LIGHTy BURNER FOR WATER HBATERS. w LPPLIOTIOI FILED PBDJ, 1908.

' Patented Aug.' 3o, 1910;v d

witnesses Y l ,1f-"-1 n l y To all'whom iimay concern:

Enwrn anni),y or Pr'rTsBUnG,PENNSYLVANIA.

Be it knownthat I, EnwrN'RUUn, of Iittsi burg, `in the county of Allegheny and State .of Pennsylvania, have invented a. certain new anduseful Improvement in Pilot-Light Burners for Tater-Heaters, of which improvement the following is a specification.

My 'invention relates to burners, of the i class known as ilot light burners, which are used in Water' ieaters for maintaining the s combustion cfa comparatively small ysupply of gas durin the periods of inaction of the heater in or er to ignite gas'automatically supplied to the main burners when water is to be heated. Y

The object of my invention is to provide Y a burner of this class which shall be simple,

inexpensive, and durable, and which shall f urther be exempt from the serious objection of becoming clogged inservice, which is manifested to a substantial degree in v burners of the ordinary construction.

The im rovement `claimed is hereinafter' fully set orth. Y v

' The pilot burner, while a simple yand comparatively unimportant member of an automatic water heater', is one which it has Y is a vertical centra been found difficult to construct and maintain in reliable working condition, and

which has been the subject of considerable study and ex riment on the ,part of water heater manu acturers.

The forni ofvpilot burner which hasprior to-my invention, been considered to e the most satisfactory one, is made in three parts, consisting of a lower vcasting connected to the gas supply pipe, a middle portion of orcelain, havin a. set of gas discharge orices, and a meta top held down by a screw. Thisconstruction is, however, objectionable both as to cost 'of construction and lack of durability. The metal to is soon destroyed by the action of the car on in the gas at hightemperature, the screw burns away, and the porcelain cracks and becomes useless, the expense andv annoyance of frequent renewals being thereby necessitated. These objections are wholly obviated by my inven- 'tion and the further advantage of sim ler and cheaper construction is also attaine In the accompanying drawings: Figure 1 section `through a pilot burner embodying my invention.; Fig. 2, a"

Y lSpecification of Letters Patent. Application led February I, 1908. Serial lilo.v 413,825.-

PILoaLLIGHT BURNER. non wA'rnnfHEA'anns.

horizontal section through the same, on the' line X-X of Fig. 1; and Fig. 3, a vertical Patented Aug'. 30, 1910.

central section illustrating a structural modiy fication. v. In the practice of my invention, I provide a burnerY having a cylindrical body, 1, and a head, 2, of larger diameter which are formed integrally from a block or section of suitable refractory material, such as soapstone, fire-clay, porcelain, or graphite composition. A central gas sup liy assage, 3) y 65 I burner orifices, 3*, extend from said passage, `near its top, to the peri hery of the body. The head, 2, is" preferab y of con-ical form,

formed inthe body,1', an a p urality Vo and is vof suiiiciently larger diameter than the body to shed any water that may drop down upon the burner and prevent it from entering the burner orifices. A screw thread, 1*, is cut upon the body, 1, at and adjoin-v ing its lower end, to provide for its connection to a short pipe section or nipple, 4, leading from a gas supply pipe, said screw thread being shown in Fig. 1 as external, and engaging an internal thread at one end of a socket or fitting, 5, the joint between the body and socket bein made tight b an annular washer or pac ring ring, G. central bore or opening extends through the socket, 5, the end of which, farther from the burner body, is connected to the nipple, 4, by a screw thread. c

The structural modification shown in Fig. v3, accords in all essential particulars with that above described, diflerin therefrom in dispensing with the` connecting socket or fitting, 5, the screw thread, 1 of the burner body, 1, being, in this case, internal, and cut atthe lower end of the gas supply passage 3,

and thenipple, 4, being screwed thereinto.

The packing ring 6, is interposed between the bottom of the body and a collar, 4, on the nipple, 4.

In operation, thegas from the supply pipe and nlpple, 4, passes through the central assage, 3, and out through the burner orices, 3, and is ignited as it passes into the atmosphere at the outer ends thereof. The top of the burner, being of the same refractory material as the body, is not broken away or destroyed by the heat of the gas in operation, and the burner orifices are not subject to being clogged by carbon or other material, the body rforeign mattei which *would adhere tov-a' y metal top.

, I c aimons my invention and desire to secure'by Letters Patent:V 4

1. The combination of anv integral burner body and a conical shaped top of refractory central gas passage and `downwardly in-Y` clined communicating burner orifices, said burner orifices, a gas screw threaded consupply pipe having a and a packing ring nection with. the body,

being provided with ak closing the joint between the body and gasV i' supply pipe connection. l i k ce 2. The combination of an integral burnerv y body and a-vconical shaped top of refractory y Y material the body being/provided with a central gas passage and downwardly in-v clined communicating gasoriices, said top overhanging the burner orifices, and an internal screw thread, and, a socket or fitting having a central gas passage and engaging the screw thread of the body.,

v e EDWIN RUUD.

-. kWitnesses.: y

Y J. SNOWDEN BELL, JAMES HAY. v 

